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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2872 | |
| 2873 | if ( $real_mime && $real_mime != $type ) { |
| 2874 | /** |
| 2875 | * Filters the list mapping image mime types to their respective extensions. |
| 2876 | * |
| 2877 | * @since 3.0.0 |
| 2878 | * |
| 2879 | * @param array $mime_to_ext Array of image mime types and their matching extensions. |
| 2880 | */ |
| 2881 | $mime_to_ext = apply_filters( |
| 2882 | 'getimagesize_mimes_to_exts', |
| 2883 | array( |
| 2884 | 'image/jpeg' => 'jpg', |
| 2885 | 'image/png' => 'png', |
| 2886 | 'image/gif' => 'gif', |
| 2887 | 'image/bmp' => 'bmp', |
| 2888 | 'image/tiff' => 'tif', |
| 2889 | 'image/webp' => 'webp', |
| 2890 | ) |